6,949 research outputs found
Amphimonhystrella boucheri Zhai & Geng & Sun 2022, sp. nov.
No full textAmphimonhystrella boucheri sp. nov. (Figs. 3–4; Table 2) Type material. Three males and two females were collected from the Estuary of Daliao River. Holotype: male 1 on slide 2021 DLHK1-2 - 16, paratypes: male 2, male 3, male 4 and female 1 successively on slides 2021 DLHK1-2 - 15, 2021 DLHK1-2 - 23, 2021 DLHK1-2 - 22 and 2021 DLHK1-2 - 23. Type locality and habitat. Intertidal muddy sediment at the Estuary of Daliao River (40°39′21″ N, 122°9′36″ E). Etymology. The species is named in honor of Dr. Guy Boucher, a well-known French nematologist. Measurements. Table 2. Description. Holotype. Body short, cylindrical, tapering slightly towards both ends. Cuticle with fine striations, 1 µm apart. Head tapering anteriorly. Inner labial sensillae not observed; six outer labial setae, 2 µm long, situated immediately anterior to four cephalic setae of same length. Lateral fields and somatic setae absent. Amphidial fovea circular, located at the level of base of buccal cavity. Buccal cavity elongated funnel shaped, 8 µm deep, lightly cuticularised. Pharynx cylindrical, widening posteriorly but not forming true bulb. Cardia elongated, with posterior end surrounded by intestine tissue. Nerve ring situated in the middle of pharynx. Secretory-excretory system not observed. Reproductive system diorchic with two opposed, outstretched testes. Anterior testis situated to the left of intestine and posterior one situated to the right of intestine. Spicules small, strongly curved, 0.7 cloacal body diameter in length, cuticularized with cephalated proximal end and pointed distal end. Gubernaculum tubular with a small dorso-caudal apophysis. Tail conico-cylindrical with two thirds conical anterior portion and a third cylindrical posterior portion. Caudal setae absent. Tail tip swollen with two terminal setae, 5 µm long. Three caudal glands in tandem. Females. Similar to males in morphological characteristics. Reproductive system monodelphic with outstretched anterior ovary to the left of intestine; postvulvar sac present. Vulva situated just posterior to mid-body, 58% of body length from the anterior end. Differential diagnosis and discussion. Amphimonhystrella boucheri sp. nov. is characterized by short body (740 µm), deep buccal cavity funnel shaped, circular amphids, conico-cylindrical tail with two thirds conical anterior portion and a third cylindrical posterior portion, males with relatively short L-shaped spicules (12 µm) and tubular gubernaculum with small apophysis. Currently, Amphimonhystrella includes five valid species, which are A. bullacauda; A. major; A. megastoma; A. parva and A. unita. Amphimonhystrella boucheri sp. nov. is close to A. unita in body size, but differs from the latter species in buccal cavity funnel shaped, not conical in latter species; amphidial fovea circular, 3 µm in diameter (versus oval and 6-7 µm in diameter); spicules 12 µm long with tapered distal end (versus spicules about 22 µm long with rounded distal end). The difference between A. boucheri sp. nov. and its congeners can be inferred from the key below.Published as part of Zhai, Hongxiu, Geng, Chunxiao & Sun, Jun, 2022, Two new species of Xyalidae (Nematoda: Monhysterida) from intertidal zone of the Bohai Sea, China, pp. 133-144 in Zootaxa 5222 (2) on pages 139-142, DOI: 10.11646/zootaxa.5222.2.2, http://zenodo.org/record/745655
Paramonohystera gracilis Zhai & Geng & Sun 2022, sp. nov.
No full textParamonohystera gracilis sp. nov. (Figs. 1–2; Table 1) Type material. Three males and two females were collected. Holotype on the slide 2021-XC2-5-15; Paratypes: male 2 on the slide 2021-XC2-5-24, male 3 on the slide 2021-XC2-5-19, female 1 on the slide 2021-XC1-2-19, female 2 on the slide 2021-XC3-2-23 and female 3 on the slide 2021-XC1-2-13. Type locality and habitat. Intertidal sandy sediment at Xingcheng along the Bohai Sea (40°37′30″ N, 120°48′7″ E). Etymology. The species name is derived from the Latin gracilis, referring to its thin and slender body. Measurements. Table 1. Description. Holotype. Body slender with a very long tail. Cuticle with fine striations. Buccal cavity large with hemispherical cheilostome and conical pharyngostom. Anterior sensilla arranged in two circles. Six inner labial sensilla papilliform; six outer labial sensilla setiform, 6 μm long and with four cephalic setae arranged in one same circle. Additional two cephalic setae located just posterior to the circle of outer labial setae. A circle of four cervical setae located posterior to amphids. Amphideal fovea circular, 6 µm in diameter or 50% of corresponding body diameter. Anterior border of fovea located posterior to buccal cavity, i.e. 12 µm from the head end. Pharynx cylindrical with enlarged base, about 10% of total body length. Pharyngo-intestinal junction with a large conical cardia, and surrounded by the intestine. Nerve ring at just before the mid of pharynx, about 67% of pharyngeal length from the anterior end. Excretory pore and ventral gland not seen. Tail long and slender, distal three quarters filiform. Tail tip slightly swollen with three 9 µm long terminal setae and a pointed spinneret. Three caudal gland cells arranging in tandem. Three caudal setae distributing on the conical region of tail. Reproductive system diorchic, testes opposite and outstretched.Anterior testis to the left of intestine, posterior one to the right of intestine. Spicules slender and elongate, 3.4 cloacal body diameter in length, bended ventrally at distal third part, slightly cephalated proximally and tapered distally. Gubernaculum plate shaped, without apophysis, dorsal to spicules. No precloacal supplements observed. Females. Similar to males in most morphological characteristics, but slightly larger body with longer tail and smaller amphidial fovea. A single long anterior outstretched ovary stretching to the pharyngeal base, situated to the left of the intestine. Ovary a wide tube, filled with oocytes. Uterus a short tube. Vagina straight. Spermatheca present. Vulva at the rear part of the body, about 70% of the body length from the anterior end. Differential diagnosis and discussion. Paramonohystera gracilis sp. nov. is characterized by a slender body with a long filiform tail; circular amphidial fovea 5–7 µm in diameter; spicules slender, 3.4 cloacal body diameter; gubernaculum small, plate shaped without apophysis, tail 14–18 times as long as cloacal or anal body diameter. So far, 16 valid species have been recorded for the genus. The new species can be easily recognized from other congeners by its slender body and distinctively long filiform tail (c′>14 vs c′<12). Among them, the present species is most close to P. riemanni in both having similar body size and general morphology, but it differs from the latter species by males having much slender body (a = 65.5–71.5 vs 52–60) and longer filiform tail (c′=14.4–15.4 vs 7–11). In P. riemanni, spicules present dilation distally, whereas the new species has no the character. Timm (1963) ever described a species, Paramonohystera longicaudata, which has a long filiform tail (c′=10). Nevertheless, the spicules of P. longicaudata are not elongated, only 26–28 µm, i.e. 1.5 times as long as cloacal body diameter. It should not belong to the genus. Paramonohystera longicaudata has been considered as an uncertain species of the genus (Yu & Xu, 2015). The difference between P. gracilis sp. nov. and its congeners can be inferred from the key below.Published as part of Zhai, Hongxiu, Geng, Chunxiao & Sun, Jun, 2022, Two new species of Xyalidae (Nematoda: Monhysterida) from intertidal zone of the Bohai Sea, China, pp. 133-144 in Zootaxa 5222 (2) on pages 135-138, DOI: 10.11646/zootaxa.5222.2.2, http://zenodo.org/record/745655
Two new species of Xyalidae (Nematoda: Monhysterida) from intertidal zone of the Bohai Sea, China
No full textZhai, Hongxiu, Geng, Chunxiao, Sun, Jun (2022): Two new species of Xyalidae (Nematoda: Monhysterida) from intertidal zone of the Bohai Sea, China. Zootaxa 5222 (2): 133-144, DOI: https://doi.org/10.11646/zootaxa.5222.2.
Growth inhibition induced by transforming growth factor-beta1 in human oral squamous cell carcinoma
No full textXiumei Wang, Wenjing Sun, Jing Bai, Linlin Ma, Yang Yu, Jingshu Geng, Jiping Qi, Zhongcheng Shi and Songbin F
sj-docx-1-jdr-10.1177_00220345221084200 – Supplemental material for Identification of Periosteal Osteogenic Progenitors in Jawbone
No full textSupplemental material, sj-docx-1-jdr-10.1177_00220345221084200 for Identification of Periosteal Osteogenic Progenitors in Jawbone by Y. Ding, C. Mo, J. Geng, J. Li and Y. Sun in Journal of Dental Research</p
FIGURE 2 in Two new species of Xyalidae (Nematoda: Monhysterida) from intertidal zone of the Bohai Sea, China
No full textFIGURE 2. Paramonohystera gracilis sp. nov. (A) anterior region of male, showing buccal cavity; (B) anterior region of male, showing amphid and anterior setae; (C) posterior region of male; (D) cloacal region of male, showing spicules and gubernaculum. Scale bars: A, B, D 10 µm; C 30 µm.Published as part of Zhai, Hongxiu, Geng, Chunxiao & Sun, Jun, 2022, Two new species of Xyalidae (Nematoda: Monhysterida) from intertidal zone of the Bohai Sea, China, pp. 133-144 in Zootaxa 5222 (2) on page 137, DOI: 10.11646/zootaxa.5222.2.2, http://zenodo.org/record/745655
FIGURE 4 in Two new species of Xyalidae (Nematoda: Monhysterida) from intertidal zone of the Bohai Sea, China
No full textFIGURE 4. Amphimonhystrella boucheri sp. nov. (A) anterior end of male, showing buccal cavity; (B) anterior end of male, showing amphid; (C) tail region of male; (D) cloacal region of male, showing spicules and gubernaculum. Scale bars: A, B, D 10 µm; C 20 µm.Published as part of Zhai, Hongxiu, Geng, Chunxiao & Sun, Jun, 2022, Two new species of Xyalidae (Nematoda: Monhysterida) from intertidal zone of the Bohai Sea, China, pp. 133-144 in Zootaxa 5222 (2) on page 141, DOI: 10.11646/zootaxa.5222.2.2, http://zenodo.org/record/745655
sj-docx-1-evb-10.1177_11769343221134400 – Supplemental material for Distribution, Phylogeny and Evolution of Clinical and Environmental Vibrio vulnificus Antibiotic-Resistant Genes
No full textSupplemental material, sj-docx-1-evb-10.1177_11769343221134400 for Distribution, Phylogeny and Evolution of Clinical and Environmental Vibrio vulnificus Antibiotic-Resistant Genes by Nan Geng, Guojin Sun, Wen-Jia Liu, Bin-Cheng Gao, Cong Sun, Cundong Xu, Ertian Hua and Lin Xu in Evolutionary Bioinformatics</p
<em>FUYUANPERLEIDUS DENGI</em> GENG ET AL., 2012 (OSTEICHTHYES, ACTINOPTERYGII) FROM THE MIDDLE TRIASSIC OF YUNNAN PROVINCE, SOUTH CHINA
No full textTwo well preserved specimens of Fuyuanperleidus dengi Geng et al., 2012 are described from the Upper Member of the Guanling Formation (Pelsonian, Anisian, Middle Triassic) in Luoping County, Yunnan Province, South China. The attribution to Perleidiformes is confirmed according to a combination of features such as the general skull pattern, with the large preoperculum showing a prominent infraorbital process, the maxilla with deep posterior region and a dentition made of long and stout peg-like teeth with an acuminate apex, the deep mid-lateral flank scales and the caudal fin with epaxial fin rays. However, this taxon shows an unique arrangement of the squamation (here considered as autapomorphy) given by the insertion of several scales in each vertical row posterior to the pelvic fin, just below the scales carrying the lateral line, when their depth decreases abruptly. Owing to this unique character, and in spite of the very recent description of this genus, the authors considered necessary the erection of a new family, Fuyuanperleididae offering also new insights on the evolutionary trends and morphological specializations of the “subholosteans”. A cladistic analysis of the well known perleidiformes, with this taxon included, supports a possible monophyly of the order, and matches well the paleobiogeographic relationships of the Gondwana fresh-water taxa. The specialized deep-bodied Gondwana and Tethyan perleidiformes are independently evolved, ascertained by the parsimony analysis
sj-pdf-1-aja-10.1177_15333175211046123 – Supplemental Material for Identification of Hub Genes Related to Alzheimer’s Disease and Major Depressive Disorder
No full textSupplemental Material, sj-pdf-1-aja-10.1177_15333175211046123 for Identification of Hub Genes Related to Alzheimer’s Disease and Major Depressive Disorder by Yajing Cheng, Meiyue Sun, Feng Wang, Xin Geng and Fei Wang in American Journal of Alzheimer's Disease & Other Dementias</p
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